When you like a guy...do not make it to obvious. If you do the guy may think that you are desperate for his attention and we don't want that. Be yourself that is the most important thing. Sure some physical contact is good but do not do it unless you are fully committed...guys can sense when you are uncomfortable and he may think that you are trying too hard to impress him. Smile, laugh, wink...all of those little things will get him moving in your direction!